#box{
    width: 128px;
    height: 128px;
    margin: 100px auto;
    /* border: 1px solid; */
    border-radius: 50%;
    animation: light 2s infinite alternate;
}

@keyframes light {
    0% {
        box-shadow: 0 0 5px rgb(252, 139, 47);
    }
    100% {
        box-shadow: 0 0 50px rgb(252, 139, 47);
    }
}